Feeding mechanism in metal-working machinery.



H. DRESES.

FEEDING MECHANISM IN- METAL WORKING MACHINERY.

APPLICATION FILED JULY 2.1915.

1,231,721 Patented July 3, 1917.

4 SHEETS-SHEET l.

H. DRESES. FEEDING MEcHAmsM 1N METAL WORKING MACHINERY. APPL-ICATION'FILED )ULY 2 1915.

f 1,231,721- Patented July 3, 1917.

4 SHEETS-SHEET 2.

ffy-J? j JZ - .w gym s@ 19' H. DRESES.

FEEDINGMECHANISM 1N METAL woRKlNG MACHINERY.

APPLICATIONILED IULY 2.1915- n Patented July o, 1917.

4 SHEETS-SHEET 3.

` H. DRESES.

vFEEDlNG MECHANISIVI iN METAL WORKING MACHINERY.

APPLRCATION FILED JULY 2| 1915. 1,231,721 Patented July 3, 1917.

4 SHEETS-SHEET 4.

HENRY DBESES, OF CINCINNATI, OHlTO.

FEEDING MECHANISM IN METAL-WORKING MACHINERIY.

' To all lwhom t may concern.'

machinery employing an axially feeding movement.

tool, and is applicable, for instance, in drilling machinery and othermachinery employing a drilling, tapping, boring or similar tool, and isexemplified as applied in a socalled drilling machine.

` It is the object of my invention to provide novel means whereby thedistance of axial movement of the tool is controlled, and further, toprovide novel controlling means acting on the tool-spindle for settingits limit of axial movement a't a denite point irrespective of thenumber of repetitions of said I have herein shown and described novelmeans for counterbalancing the tool-spindle which are compact vinstructure, comparatively short in movement of the moving parts, and soarranged as to be a self-contained structure with the 'tool-feedingmechanism, but I do not herein claim said meansfor counterbalancing thetoolspindle, but show, describe and claim the same in an applicationwhich is .divisional hereof, being Serial No. 60,295, filed November 8,1915, and issued as Patent- No.

1,181,580, dated May 2, 1916.

The invention will be further readily un derstood from the followingdescription and claims, and from the drawing, in which latter Fi re 1 isa front elevation of so much of a rilling machine as is necessarytoillustrate my invention.

2 is an enlarged front elevation of my improved mechanism.

3 is a plan view ofthe same.

Fig. 4 is a cross-sectional detail taken on the line 4-4 of Fig. 2,showing a bottom view of the control mechanism.

Fig, 5 is a vertical section of the same taken on the axial line of thefeed shaft, on the line 5 5 of Fig. 2.

Fig. 6 is a detail in front elevation, showing the shifting means 'forthe two-speed speed-changing mechanism.

Fig. 7 is a vertical section of my improved Specification of LettersPatent. Application led July 2, 1915. Serial No. 37,760.

Patented July 3, 191'?.

device taken on thel axial line of the toolspindle, on the line 7-7 ofFig. 2.

Fig. 8 is a horizontal section of my im-` proved device, taken 'on aline corresponding to the line 8--8y of Fig; 5.

Fig. 9 is a cross-section of the same taken on a line corresponding tothe irregular line Of 5. ,i

Fig. 10 is a. detail in front elevation of the four-speed speed changingmeans, section on the line 10-10 of Fig. 10a.

partly in Fig. 10a is a cross-section of the same on i of my imtakcn'on'a line corresponding to the line 15-15 of Fig. '14.

In the present exemplification of my inventionz 15 represents the radialdrill-arm, which ,1s arranged to have suitable movement up and down andabout a column designated generally as 16. A suitable toolhousing, shownas a drill-head 17 is provided. It is shown mounted on aslide 18,

yarranged to slide laterally on guideways 19 o n the drill-arm, beingadjusted by a handwheel 2O which rotates a suitable pinion 21 meshinglwith a 'rack 22 extending lengthwise of the drill-arm, and arranged toplace the drill-head at suitable points alon the drill-arm, as is usualin structures o this character, for positioning the tool, as the drill23, with relation to the material, represented as a casting 24C.A

26 represents the drive-shaft which in the presentfexemplification isarranged to provide the driving force for rotating and also for feedingthe drill-spindle 27, at the lower end of which the drill 23 is secured.The

.shaft 26 is arranged vto be driven in suitable or usual manner forhaving different speeds the character of operations it is desired toperform.

Ahub 31 has spline-connection 32 with the drive-shaft' and lis arrangedto be moved 4imparted thereto by power,I depending on `A on the end of al ver 66ay vThe lever is pivoted on lengthwise along the drive-shaft, asby being journaled in a bearin 33 of a bracket 34 extending from the slie 18 of the drill-head. (See Figs. 7, 8, '9 and 11). This hub has abevel-gear 35 thereon, which meshes with a bevel-gear 36 on a shaft 37journaled in a bearing 38 on the slide and having a second bevel-gear 39secured thereto.

The drill-head is arranged to be adjusted about the axis of rotation ofthe shaft 37 for placing the drill-spindle in uprightposition or at anangle with relation to the work. The drill-head is guided in thisadjpstment by an annular guideway 40 on the slide and is arranged to beclamped in adjusted position, as by clamp-bolts 41, extending throu hholes 42 in the drill-head, the heads of t e bolts being received in anannular T-slot 43 in the slide, nuts 44 clamping the parts toether.

, The bevel-gear 39 meshes with a bevel-gear 46,. the hub of which ing47 of the drill-head and has spline-connection 48 with the drill-spindlefor rotating the drill-spindle in its bearings 49 of the drill-head.

A second bevel-gear 50 is secured to and rotateswith the bevel-gear 46and meshes with a bevel-gear 51 fast on a shaft 52 ]our naled in abearing 53 of the drill-head and at its other end carrying spur-gears 54of different diametersfast thereon, forming a nest of gears. (See Figs.3, 5, 8 and 9).

The gears 54 mesh respectively with gears 55 of a coacting nest of gearsarranged to be selectively secured to ashaft 57 exemplified asaccomplished 'through a ducking key 58. This key is on a, key-bar 59sliding in a roove 60 in the shaft 57 and pressed toward ey-slots 61 inthe gears A55,bya spring 62. A separating collar 63 insures engagementof the key with only one gear at a time. The key-'bar 1s connected atits inner end at 64 with a sleeve 65 having longitudinal movement on theshaft 57 and controlled by a lea shoulderbolt 67, and has a fork 68thereon which is received abouta pin on an extension 69 of the sleeve,said .extension slot 70 in the drill-head, for moving the sleeve. (SeeFigs. 5, 6, 8 and 9).

A shaft 71 is in line with the shaft 57 and is journaled in a bearing72, the shaft 57 being journaled in a bearing 71 has a hollow inner end74 in'which the uter end of the shaft 57 is received. clutch 75 is-located between the shafts 57 and 71 for forming drive-connectionbetween said shafts or releasing the driveconnection of shaft 57 fromthe shaft 71. The said'clutch is exemplified as a toothed clutch, theteeth of which shaft71 andon a clutch collar 76 which hasspline-connection 77 with the shaft 57.

is journaled in a bear- Y gears of the nest of gears rotating in a beingguided in a 7 3.- The shaft are respectively Gears 80 forming ferentdiameters are fixed onl the shaft 71. The 'shaft 71 is held againstendwise movement by locating its bearing between said nest of gears andthe annular fiange 81 carl'ying-the clutch-teeth formed on said shaft.

he shaft 57 is held against endwise movement by locating its bearingbetweenl the gears 55 and a collar 82 fast on said shaft.

Movement of the clutch-collar 76 is controlled by a lever 86, which isfulcrumed on a shoulder bolt 87 on the drill-head and is provided with afork 88 received in the annular groove 89- of the clutch-collar, thefork being pivoted by its pin 90 in a bearing 91 of said lever. (SeeFigs. 8, 9 and 12). The movement of the lever controls the clutched orunclutched relation of the a nest of gears of difparted to thedrill-spindle or said feeding movement is stopped.

The respective gears of the nest of gears 80 mesh with the gears of anest of gears 93 of different diameters normally loose on a shaft 94 butarranged to beselectively xed to said shaft in suitable manner, as by aducking key 95. (See Figs. 8, 9 and 10). Collars 96 about the shaft 94between said 93 'prevent simultaneous meshing of said key with more thanany one of the gears of said nest of gears.

The key is arranged to make engagement l* with said gears by being`received in the selective key-slots 97 in the bores of said gears. Theducking key is on a key-bar 98 sliding in a' groove 99 in the shaft 94and pressed toward the key-slots 'by a spring 100. The key-bar hasconnection 101 with a slide- 102 having slide bearing on the shaft 94.

The shaft 94 is journaled in bearings 103 on the drill-head. The slide102 is provided with a rack' 105 withwhich a pinion 106 meshes, thepinion being on a shaft 107 bearing 108 of the drill-head and having ahandle 109 fast thereon for rotatin the shaft, (see also Figs. 2, 7, 10and 10a), t e handle being provided with the pointer 110 arranged toregister with the respective markings of a gage 111 on the drill-headfor indicating the position of the ducking key.

The speed of feed of the spindle is`determined by the drive-connectionbetween the shafts 71 and 94 through the respective gears of the nestsof gears 80 and 93, for

A imparting four different speeds of feed to the drill-spindle. In thepresent instance these speeds are multiplied by two by engagement of thel'ducking key 58 with .the respective gears 55.

A feed-shaft 114v is provided. A worm 115 is fast on the a worm-wheel116 which is fast on a bushing 117 journaled in a bearing 118 of thedrilli head and prevented from endwise movement shaft 94 and meshes withby the annular flange 119 of said bushing at one end of said bearing andthe worm-wheel fast on said bushing at the other `end of said bearing.

The feed-shaft is rotatable in said Ibushing when it is desired toimpart avspeedy rotation by hand to the feed-shaft, for rapidly raisingor lowering the drill-spindle, and said bushing is arranged to be fixed`to said feed-shaft during the feeding movement of the drill spindle,this selective attachment or detachment of the worm-wheel with thefeed-shaft being accomplished by means` of a4 clutch 120 exemplified asa toothed clutch,

the teeth of which are respectively located on the bushing 117 and a hub121. (See- Figs. 2, 5 and 11).

The hub 121 is slidable lengthwise on a bushing 122. The bushing 122 isfixed to the feed-shaft, as by key and pinrvconnection as shown. The hub`121 has spline-connection 124 with the bushing for disengagement of theclutch 120 when\it is' desired to rotate the feed-shaft by hand forquick axial movement of the drill-spindle, or for engagement of saidclutch when it is desired to rotate the feed-shaft by power or by meansof a handwheel 125 for feeding the drill-spindle. The

hub 121 is provided with a cap 126, a rod' 127 extending inwardly fromsaid cap int-o the hollow 128 in the end of the feed-shaft. The innerend of the rod is provided with a collar 129 fixed thereon between whichand,

a collar 130, xed in the outer end of the hollow of said shaft, ahelical spring 131 is arranged for normally pressing the cap andconsequently the hub 121 upwardly for normal engagement of the clutch120.

The hub 121 is moved axially by means'of arms 134 pivoted on pins 135 tothe hub and having knobs 136 at their inner `ends received in an annulargroove 137 in the bushing 122. If it is desired to impart Vquickrotation to the vfeed-shaft without rotating the worm-wheel, downwardpressure is exerted upon the outer ends of any oneof the arms 134,whereby the hub is pushed' awayv from the bushing 117 for disengagingthe clutch 120, whereupon the hub may be turned by means of the armsforv quick axial movement of'the drill-spindle, a pin 138 guided in ahole 139 in the hub being spring-pressed by a spring 140 into a notch141'in the bushing 122 for holding said hub in down position and theclutch in unclutched relation when one of. the arms 134 has beenmanipulated for the purpose, a slight upward blow or push on any one ofsaid arms moving said pin out yof its notch and causing rengagement ofsaid clutch by the action of said spring 131. The connection between thefeed-shaft and the spindle in the present exemplification isaccomplished by providing the feed-shaft with a bevel-pinion 143 whichmeshes with a provided with a pinion 149 which meshesv with a rack 150on a rack-sleeve 151 slidable lengthwise in a bearing 152 in thedrillhead, the drill-spindle having a reduced end 153 extending throughsaid sleeve, the said sleeve and drill-spindle having combined axialmovements. (See Figs. 7, 11 and 14.) There Ais preferably a ball bearing154 between the lower end of the sleeve and the annular shoulder 155 onthe drill-spindle, the upper end of the drill-spindle being providedwith a bearing 156 for the upper end ofthe sleeve.

In order to control the limit of feeding movement of the drill-spindle,for instance for arranging the drill-spindle for separately drilling aplurality of holes of equal depths in material, and for other purposes Iprovide novel controlling mechanism for t e depth of feed of the.drill-spindle.

In the. resent exemplification of this deshaft. The plate 166'isprovided with a stud 169 on which a pinion- 170, which meshes with theinternal teeth 165, rotates, this pinion also meshing with a pinion 167,the teeth of which are cut in the feed-shaft. The plate 166 is.prevented from rotating by being provided with a pin 171 which isreceived in a slot 172 of a retaining part 173 secured to thedrill-head. The plate 161v is arranged to be selectively secured to thering 164 and it is also provided with a striker-part 174, f

shown as a striker-pin.

The'striker-pin 174 is arranged to coact with a striker-part 175adjustable on the' lever 86, which controls the clutch 75. Thestriker-part 175 is adjustable in a slot 176 of a lug 177 on the leverand has a slot 178 through which a clamp-bolt 179 passes into the lugfor clamping the striker-part in adjusted position to the lever.

When the striker-part 174 strikes the striker-part'175 thev said clutchis thrown into disengaged relation, and the time of this striking iscontrolled by the position of the plate r161v with relation to the` ring164, this positioning being indicated by a gage 180, the markings ofwhich are shown on the inverted frusto-conical face 181 of the plate 161and the coacting fingerV 182. The striker-part 175 on said lever isprovided with` inclined faces 183 coacting with the striker-part 174 forease of operation.

' The lever 86 is providedwitha handle 184 located in clined, the

for manual control of the clutch 75.

It will be noted that the feed-shaft is incontrolling device beingcorrespondingly inclined, the markings of the gage being on the invertedfrusto-conical face of the control device for placing said maikings inconvenientposition for being rea For positioning the relation betweenthe plate 161 and the ring 164, I provide one or more pull pins 186. Theinner end of the pins 186 is-provided with a tooth 1,87 arranged toengage in the toothed spaces of the external teeth outer end having aknob 189. A pin 190 screw-threaded in the outer end of said hole,

and pressed inwardly by a sprinf 198, is arranged to engage oeither oneo the recesses 194 for holdin said tooth-pin in engaging or disengageposition with relation to said ring. l

When it is desired to control the depth to which the drill shall enter apieceA of work, the drill is fed axially either by hand or power, sothat its point will be in the plane of the face of the work it isdesired 5 that the drill shall enter, as shown in Fig.

1,-whereupon the feed of the drill is stopped. The teeth 187 are thenpulled outwardly to disengage the ring. 164, which Vreleases thev plate161, which i`s then free to turn about the feed-shaft. The plate is thenturned manually until the desired marking on its gage 180, representinthe desired depth of rilled, is opposite the For instance, hole of twoinches depth, the plate 161 is turned until the marking 2 representingtwo inches on the gage'180 is opposite the plate 161.

pointer 182, whereupon the tooth-pins 186 are pushed inwardly forcausing the teeth 187 at their inner ends to engage between the teethat. said point of adjustment located in the ring 164.

When now the feed-shaft is caused to turn, the pinion 170 is caused torotate for imparting motion to the ring 164, which is thereby caused t@turn for rotating the It may be here stated that the strikerpart 174 islocated at the zero position of the gage 180, and that in the adjustmentof the plate 161 the striker-part 174 thereon has been distance'd fromthe striker-part 175 an angular distance corresponding to the arc ofmovement of the striker-part 174 during the desired' axial drillingmovement of the drill-spindle. The speed of this angular movement issubstantially greater than the speedof said axial movement, owing to thestructure and arrangement of the parts so that minute subdivision of thegage and of the parts as many 188 on the ring 164, its

a hole 191, closed by' a plug 192,

if it is desired to drill al the spaces accuracy indepths of holes cutis obtained. The movement of the gage is preferably relverse to thedirection of rotation of the feed-shaft.

The striker-part l174 travels this angular distance and at the end ofthis travel it strikes the striker-part 175 for disengagmg the clutch75. Upon disengagement of this clutch-the axial feed of the spindleceases. The spindle is then raised for drawing the tool out of the work,or anotherpiece of work the operation repeated-without readjustmenttimes as desired.

For causing quick 4disengagement of the clutch 75, the lever 86 isprovided with a pin 196 whose end is provided with inclined faces 197which Vcoaotwith the inclined faces 199, on a pin 201 on. thedrill-head. One of the pins, instanced as the pin 201, is spring-pressedby a spring 202 toward the other pin, instanced as the pin 196, theadvancing movement between the inclined and the work shifted,substituted, andy the apex of the pin 201, the inclined faces beingspring-pressed toward each other, will cause rapid movement of the leverfor disengagng the clutch -with a quick movement. Corresponding quickreverse movement and therefore quick engagement between the clutch teethis also assured by this device.

I have in my improved device provided novel means for counterbalancingthe drill- -spindle by means in which a counterweight is provided whichhas a comparatively short range of movement and is self-contained withthe drill-head. (See Figs. 7', 11, 14 and 15). Thus 204 is acounterweight which has movement lengthwise of the upward ex- ,tension205 of the drill-head.l The counterweight is rovided with a guideway 206coacting wit a guide 207 on said upward extension. A rod 208 is securedrin a lug 209 of said upward extension and slides in a bearing 210 onsaid counterweight. The counterweight is also provided with a rack 211with which a pinion 212.0n the shaft 145 meshes. This construction formsoperating and guiding means for the counterweight.

The pinion 149 which meshes with the rack for axial feed of thetool-spindle and the pinion 212 which meshes with the rack- 211 on thecounterweight are both fast on the same shaft, the rack of thedrill-spindle and the rack of the counterweight engaging said pinionsrespectively at opposite sides of said shaft, so that the weight of thecounteracting downwardly upon oneside of the pinion 212 forces theopposite side of the pinion 149 upwardly for balancing the weight of thedrill-spindle.

It will be further noticed that the pinion 149 is larger than the pinion212. A given 13o member adjustable for angul mamar axial movement of thedrill-spindle will therefore result in a less distance of movement ofthe counterweight, so that the distance through which the counterweightmoves is comparatively short, thereby. necessitating only acorrespondingly short range of space for permitting this movement andresulting in economy of space in the structure and providing aself-contained counterbalancing structure for the drill-spindle.,

The shaft 145 has the pinions 149, 212, formed thereon. The bevel-gear144 is fast on the shaft 145. A bushing 213 is fast inI a bearing 214 ofthe drill-head. A bushing 215 is received about' the shaft 145 betweenthe gear 149 and the rack 150 and is fast in a bearing 216 of thedrill-head. The shaft 145 rotates in the bushings 213, 215, and is heldin place thereby.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is: j

1. In feeding mechanism of the character described, the combination of atool-spindle, a feed train of gearing for feeding said toolspindleaxially rotatable shaft and a -clutch, a tripping mechanism for saidclutch comprislng a ar distance of movement about the axis of rotationof said rotatable shaft for adjustably fixing the moment of tripping ofsaid tripping mechanisml and a train of gearing between said rotatableshaft and said member for rotating said member.

2. In a feeding mechanism of the character described, the combination ofa toolspindle, a feed train of gearing for feeding said tool-spindlelongitudinally comprising a drive-shaft, a rotatable shaft and a clutch,a rotatable member having thereon, a trip on said`rotatable member inradial line wlth the zero position of said gage, a coacting triptherefor having operative connection with said clutch for tripping thesame, said rotatable member adjustable about the axis of rotation ofsaid rotatable shaft for positioning the graduations of said gage withrelationto said coactin trip, and a train of gearin between sairotatable shaft and said r atable member for rotating said rotatablemember. i

3. In a feeding 'mechanism of the character described, the combinationof a toolspindle, a feed train of` gearing for axially feeding saidtool-s indle comprising a driveshaft, a clutch an a rotatable shaft,clutcho erating means, a rotatable element about t e axis of rotation ofsaid rotatable shaft providedv with a substantially .peripheral gage andwith a tripper-part lfor said clutchoperating means, means foradjustingsaidcomprising a drive-shaft, a

an annular gage.

a train of gearing between said shaft and rotatable element for rotatingthe latter in predetermined relation with the axial movement'of saidtool-spindle.

4. In a drilling. machine, the combination of a drill-head, an axiallymovable drillspindle therein, a drive-shaft, alfeedtrain of gearing for,longitudinally feeding said drill-spindle mounted on said drill-headand comprising a clutch and a feed-shaft, said ymoment of coperation ofsaid control-part with said clutch-operating means.

5. In a drilling machine, the combination of a drill-head, an axiallymovable drillspindle therein, a drive-shaft, a feed train of gearing forlongitudinally feeding said drill-spindle mounted on said drill-headcomprising a clutch and a feed-shaft, said drive-shaft having operativeconnection with said feed train of gearing for driving the same, meansfor operating said clutch, a control means for said last-named meanscomprising a rotatable element aboutsaid feed-shaft and a control partfor said clutchoperating means, a train of gearing between saidfeed-shaft and said rotatable element, means for adjusting the relationbetween said last-named train of gearing and said rotatable 'element forcontrolling the moment of .coperation of said control-part with saidclutch operating means, a slide, and means for selectively adjustingsaid drill-head on said slide whereby the direction in which saidtool-spindle extends is adjusted withrelation to the vertical and theothers of said aforementioned parts are maintained in their relationswith said toolspindl, for the purpose described.

6. In feeding mechanism of thescharacter described, the combination of atool-s indle, a feed train of gearing for axially fleding saidtool-spindle comprising a drive-shaft, a rotatable shaft and a pair ofclutches, a rotatable element having operative connection with one ofsaid clutchesfor operating the same, said rotatable element adjustableabout the axis of rotation of said rotatable shaft for controllingr itsmoment of operation of said last-named clutch, and means for manually4operating the other of said clutches for interrupting said feed train ofi gearing and placing said spindle feed under manualcontrol of theoperator.

7. In a feeding mechanism of the character described, the combination ofa toolspindle, a feed train of gearing for axially feeding saidtool-spindle, said feed train of gearing comprising a drive-shaft and afeedshaft, a gear onthe latter, a rotatable element about the axis ofrotation of said feedshaft, 'an internal gear, means for adjustablyconnecting said internal gear and said rotatable element,said gear onsaid feedshaft having gear connection with said internal gear, said feedtrain of gearing comprising gearing between said drive-shaft and saidfeed-shaft including a clutch and said rotatable element having a clutchoperating part thereon adjusted for determining its moment of operationby said adjustment of said rotatable, element.

8. In a feeding mechanism of the character described, the combination ofa toolg spindle, a feed tram of gearing for axially feeding saidtool-spindle, said feed-train of gearing comprising a drive-shaft andafeedshaft, a gear thereon onX said feed-shaft, a rotatable elementabout the axis of rotation of said feed-shaft, an internal gear, meansfor adjustably connecting said internal gear and said rotatable element,said gear on said feed-shaft having gear connection with said internalgear, said feed train of gearing comprising gearing between saiddrive-shaft and said feed-shaft including a clutch and said rotatableelement having a 'clutch operating part thereon adjusted for determiningits moment of operation by said adjustment of said rotatable element, asecond clutch in said feed train of gearing, and manually operatingmeans therefor whereby said lastnamed clutch is interrupted and saidfeedshaft placed under manual control of the operator.

9. In a feeding mechanism of the character described, the combination ofa toolspindle, a feed train of gearing for axially feeding saidtool-spindle comprising a driveshaft, a feed-shaft, and a clutch betweensaid shafts, a clutch operating part, a rotatable member .about saidfeedshaft having a clutch controlling part thereon coacting with Saidclutch operatlng part, an internal gear for said rotatable member, meansfor adjustably connecting said rotatable member and said internal gearfor determining the moment of operation of said clutch operating part,and a gear on said feed-shaft, said last-named gear being in train withsaid internal gear. 10. In a feeding mechanism of the characterdescribed, the combination of a toolspindle, and means for axiallyfeeding said tool-spindle comprising a drive-shaft, a slantingfeed-shaft, a rotatable member adjustable thereabout, and a clutchbetween said shafts, said rotatable member having a substantiallyinverted frusto-conical peripheral face having indicating means Lagaf/a1thereon for indicating the extent of said adjustment, a clutch operatingmember, said Vrotatable member having a tripping part l thereon coactingwith said clutch operatmg member and adjusted by the adjustment ofv saidrotatable member about said feed-shaft. 11. In feeding mechanism of thecharacter described, the combination of a tool-spindle, a feeding trainof gearingfor axially feeding said-too1spindle comprising a driveshaft,a slanting shaft and a clutch between said shafts, a clutch operatingmeans, a rotatable element about Said slanting shaft having a trippingpart thereon coacting with said clutch operating means, means foradjusting saidL rotatable element about said slanting shaft, and meansfor rotating said rotatable element from said slantingshaft at a reducedspeed with relation thereto.

12. In feeding mechanism of the character described, the combination pfa toolspindle, a ower train of gearing for axially feeding saidtool-spindle comprising a driveshaft, a slan ing shaft and a clutch, .aclutch operating means, a rotatable element about said slanting shafthaving a tripping part thereoncoacting with said clutch-operating means,means for adjusting said rotatable element about said slanting shaft,means for .rotating said rotatable element from said slanting shaft at areduced speed withrelation thereto, a manually rotatable` means forsaidslanting shaft, `and a clutch between said *power train of gearing andsaid manually rotatable element\ for interrupting the operativeconnection between said power and said slanting shaftkand train ofgearin anting shaft under manual placing said s control of the operator.

13. In' a feeding mechanism of the character described, the combinationof a toolspindle, a power train of gearing for axially feeding saidtool-s indle comprising a driveshaft, a feed-sha t, a clutch betweensaid drive-shaft and said feed-shaft, a clutch operating part, arotatable member about said feed-shaft having a control-part thereon forerating\part, a rotatable member about said feed-shaft having acontrol-part thereon for said clutch operating part, means for rotatingsaid rotatable member from said feed shaft, and amanually controlledclutch between said last-named clutch andcsaid feedshaft.

15. In a feeding mechanism of the character described, the combinationof an --ax1- feedable tool-spindle,

ally feedable too1-spind1e,a feed train of gearing for axially feedingsaid tool-spindie comprising a drive-shaft, a. feed-shaft and a clutch,a rotatable member having a part thereon arranged for operating saidclutch, an internal gear, gearing be-` tween said feed-shaft andinternal gear for rotating said internal gear, and means for adjustingthe operative connection between said internal gear and said rotatablemember for controlling the moment of actuation of said Clutch.

ll 3. ln feeding mechanism 'of the characteil described, the combinationof an axially feedable tool-spindle, a feed train of gearing for axiallyfeeding said tool-spindle comprising a drive-shaft, afeed-shaft and aclutch, means for operating said clutch comprising a rotatable memberjournaled about the axis of rotation of saidfeed-shaft, an internalgear, a gear on said feed-shaft, gearing between said last-named gearand said internal gear for rotating said internal gear from saidfeed-shaft, means for adjustably securing together said rotatable memberand said internal gear, and a trip-- per part on said rotatable membercoperating with said clutc p V17. In feeding mechanism of the characterdescribed, the combination of an axially a feed train of gearmg foraxially feeding said tool-spindle comprising a drive-shaft,afe`edshaftand a clutch, a pair of plates received about said feed-shaft, anexternal gear and an internal gear between said plates, journaled toVone of said plates, 'means for adjustably securing the other of saidplates to said internal gear, and tripping means on said last-namedplate-Z for tripplng said clutch, said tripping means movable with saidlast-named plate for adjusting the trip.- ping moment of said clutc 18.In feeding mechanism of the character described, the combination of anaxially feedable tool-spindle, a feed train of gearing for axiallyfeeding said tool-spindle comprising a drive-shaft, a slanting shaft anda clutch, an upper plate and a lower plate received about said slantingshaft, an external gear and an internal ygear between said plates, saidexternal gear journaled to one of'said plates, `means for adjustablysecuring the other of said plates to said internal gear,

` for, a feed-shaft in said external gear said rotatable member forscribing witnesses.

tripping means and an inverted :truste-conical gage on said saidtripping means 'movable with said last-named plate for adjustlast-namedplate,

said last-named shaft and said feed-shaft A whereby a plurality ofdifferent speeds are imparted to saidA feed-shaft, a clutch for op-Aeratively mechanism with said shaft in train with said drive-shaft, arotatable member about connecting said speed changing 4 said feed-shaft,tripping means on said t rotatable vmember for said clutch, drivingmeans between said feed-shaftv and said rotatable member,` the operativerelation between'said driving means and said rotatable member foradjusting the trip} ing moment of said tripping means.

' 20. In feeding mechanism of the character described, the combinationof an axially feedable tool-spindle, adrive-shaft theretrain .with saidtool spindle, a. shaft in train with lsaid driveshaft, said traincomprising a speed changing mechanism, lspeed changing mechanism betweensaid last-named shaftr and said feed-shaft whereby a plurality ofdifferent speeds are imparted to said feed-shaft, a clutch foroperatively connecting said speed changing mechanism with said shaft intrain with said drive-shaft, a rotatable member about said feed-shaft,tripping means on ing means between saidfeed-shaft and said rotatablemember, and means for adjusting y the operative'relation between saiddriving means and said rotatable member for adjusting the .trippingmoment of said tripping means.

In testimony whereof, .I have hereunto signed my name in the prence oftwo sub- HENRY nREsEs.` Witnesses:

HARRY L. Lunen,

TImREsA M. SILBER.

and means for ,adjusting said* clutch, driv-

